kubernetes部署nfs-server-provisioner

nfs-server-provisioner简介

nfs-server-provisioner部署一个nfs server，然后创建pv与nfs进行绑定，所有其他使用nfs的storageclass的pvc所动态创建的pv都会在这个pv下进行挂载。

github地址：https://github.com/helm/charts/tree/master/stable/nfs-server-provisioner

nfs-server-provisioner部署

安装nfs-server-provisioner

helm repo add apphub https://apphub.aliyuncs.com

helm install nfs-server-provisioner \
  --set persistence.enabled=true \
  --set persistence.size=30Gi \
  --set persistence.storageClass=standard \
  --set storageClass.defaultClass=true \
  --set nodeSelector.kubernetes\\.io/hostname=node01 \
  apphub/nfs-server-provisioner

查看创建的pods

[root@master01 ~]# kubectl get pods
NAME                       READY   STATUS    RESTARTS   AGE
nfs-server-provisioner-0   0/1     Pending   0          3s

查看创建的pvc

[root@master01 ~]# kubectl get pvc
NAME                            STATUS    VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
data-nfs-server-provisioner-0   Pending                                      standard       18m

查看创建的storageClass

[root@master01 ~]# kubectl get sc
NAME            PROVISIONER                            RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
nfs (default)   cluster.local/nfs-server-provisioner   Delete          Immediate           true                   6m45s

部署后pod和pvc都处于pending状态，需要提供一个pv来做存储卷，并且这个pv要与安装之后自动生成的pvc绑定。

手动创建hostPath类型的pv:

cat > nfs-server-pv.yaml <<EOF
apiVersion: v1
kind: PersistentVolume
metadata:
  name: data-nfs-server-provisioner-0
spec:
  capacity:
    storage: 30Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    ## 绑定在node上的位置
    path: /data/k8s/volumes/data-nfs-server-provisioner-0
  claimRef:
    namespace: default
    ## 自动生成的pvc名字
    name: data-nfs-server-provisioner-0
EOF

执行yaml

kubectl apply -f nfs-server-pv.yml

再次查看pod和pvc

[root@master01 ~]# kubectl get pods
NAME                       READY   STATUS      RESTARTS   AGE
nfs-server-provisioner-0   1/1     Running     0          6m38s

[root@master01 ~]# kubectl get pvc
NAME                            STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
data-nfs-server-provisioner-0   Bound    data-nfs-server-provisioner-0              30Gi       RWO            standard       6m39s

创建测试pod

$ cat test-pod.yaml
kind: Pod
apiVersion: v1
metadata:
  name: test-pod
spec:
  containers:
  - name: test-pod
    image: busybox
    command:
      - "/bin/sh"
    args:
      - "-c"
      - "touch /mnt/SUCCESS && exit 0 || exit 1"
    volumeMounts:
      - name: nfs-pvc
        mountPath: "/mnt"
  restartPolicy: "Never"
  volumes:
    - name: nfs-pvc
      persistentVolumeClaim:
        claimName: nfs-pvc

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-pvc
spec:
  storageClassName: "nfs"
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 100Mi

执行yaml文件

kubectl apply -f test-pod.yaml

查看自动创建的pvc和pv

[root@master01 ~]# kubectl get pvc
NAME                            STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
data-nfs-server-provisioner-0   Bound    data-nfs-server-provisioner-0              30Gi       RWO            standard       36m
nfs-pvc                         Bound    pvc-2d1eb647-5efb-44ab-a761-73ae9763b2f9   100Mi      RWO            nfs            4m21s

[root@master01 ~]# kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                                   STORAGECLASS   REASON   AGE
data-nfs-server-provisioner-0              30Gi       RWO            Retain           Bound    default/data-nfs-server-provisioner-0                           14m
pvc-2d1eb647-5efb-44ab-a761-73ae9763b2f9   100Mi      RWO            Delete           Bound    default/nfs-pvc                      nfs                     4m23s

在node01验证写入数据成功

[root@node01 ~]# cd /data/k8s/volumes/data-nfs-server-provisioner-0
[root@node01 data-nfs-server-provisioner-0]# ls pvc-2d1eb647-5efb-44ab-a761-73ae9763b2f9/
SUCCESS

参考：https://juejin.im/post/5e2d83ca6fb9a02fbd379010